/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.OutputUtilities;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.ListUtilities;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;
import org.mybatis.generator.config.GeneratedKey;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class InsertElementGenerator extends AbstractXmlElementGenerator {

  private boolean isSimple;

  public InsertElementGenerator(boolean isSimple) {
    super();
    this.isSimple = isSimple;
  }

  @Override
  public void addElements(XmlElement parentElement) {
    XmlElement answer = new XmlElement("insert"); //$NON-NLS-1$

    answer.addAttribute(new Attribute("id", introspectedTable.getInsertStatementId())); //$NON-NLS-1$

    FullyQualifiedJavaType parameterType;
    if (isSimple) {
      parameterType = new FullyQualifiedJavaType(introspectedTable.getBaseRecordType());
    } else {
      parameterType = introspectedTable.getRules().calculateAllFieldsClass();
    }

    answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
        parameterType.getFullyQualifiedName()));

    context.getCommentGenerator().addComment(answer);

    GeneratedKey gk = introspectedTable.getGeneratedKey();
    if (gk != null) {
      IntrospectedColumn introspectedColumn = introspectedTable.getColumn(gk.getColumn());
      // if the column is null, then it's a configuration error. The
      // warning has already been reported
      if (introspectedColumn != null) {
        if (gk.isJdbcStandard()) {
          answer.addAttribute(new Attribute("useGeneratedKeys", "true")); //$NON-NLS-1$ //$NON-NLS-2$
          answer.addAttribute(new Attribute("keyProperty", introspectedColumn.getJavaProperty())); //$NON-NLS-1$
          answer.addAttribute(new Attribute("keyColumn", introspectedColumn.getActualColumnName())); //$NON-NLS-1$
        } else {
          answer.addElement(getSelectKey(introspectedColumn, gk));
        }
      }
    }

    StringBuilder insertClause = new StringBuilder();
    StringBuilder valuesClause = new StringBuilder();

    insertClause.append("insert into "); //$NON-NLS-1$
    insertClause.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
    insertClause.append(" ("); //$NON-NLS-1$

    valuesClause.append("values ("); //$NON-NLS-1$

    List<String> valuesClauses = new ArrayList<String>();
    List<IntrospectedColumn> columns = ListUtilities.removeIdentityAndGeneratedAlwaysColumns(introspectedTable
        .getAllColumns());
    for (int i = 0; i < columns.size(); i++) {
      IntrospectedColumn introspectedColumn = columns.get(i);

      insertClause.append(MyBatis3FormattingUtilities.getEscapedColumnName(introspectedColumn));
      valuesClause.append(MyBatis3FormattingUtilities.getParameterClause(introspectedColumn));
      if (i + 1 < columns.size()) {
        insertClause.append(", "); //$NON-NLS-1$
        valuesClause.append(", "); //$NON-NLS-1$
      }

      if (valuesClause.length() > 80) {
        answer.addElement(new TextElement(insertClause.toString()));
        insertClause.setLength(0);
        OutputUtilities.xmlIndent(insertClause, 1);

        valuesClauses.add(valuesClause.toString());
        valuesClause.setLength(0);
        OutputUtilities.xmlIndent(valuesClause, 1);
      }
    }

    insertClause.append(')');
    answer.addElement(new TextElement(insertClause.toString()));

    valuesClause.append(')');
    valuesClauses.add(valuesClause.toString());

    for (String clause : valuesClauses) {
      answer.addElement(new TextElement(clause));
    }

    if (context.getPlugins().sqlMapInsertElementGenerated(answer, introspectedTable)) {
      parentElement.addElement(answer);
    }
  }
}
